Photo by Zamirul Roslan on Unsplash

I need to enlighten you about something that sounds incredibly boring but will actually save you a proper chunk of money.

We’re talking about the petrol station.

We’re talking about the petrol station.

You fill up,

Wince at the price, buy a chocolate,

Leave.

We all do it.

But a clip that’s been doing the rounds recently pulled back the curtain on a few pump-side tricks that most of us simply don’t know about, and once you know them, you can’t unknow them.

So I did what I always do: I went down a rabbit hole, asked around, and dug up everything I could find. Below is the full picture, from the tips and tricks to a handful of lesser-known ones that genuinely made my eyes go wide. With petrol sitting at around 135p per litre right now, even small changes add up to real money over a year.

“The average UK driver fills up roughly 30 times a year. Save just 5p per litre on a 50-litre tank and that’s £75 back in your pocket. For doing almost nothing differently.”

Never fill up on a motorway. Ever.

I genuinely cannot stress this enough. Motorway service stations are, without putting too fine a point on it, a racket. Prices can be 15–20p per litre more than a supermarket forecourt just a few miles off the junction. If you’re planning a long drive, fill up before you leave. Download the free Fuel Finder UK app, which pulls live prices from nearly 8,000 stations across the country, updated every five minutes from the government’s own database. You will never pay motorway prices again once you’ve used it.

Potential saving: up to £10 per fill-up

Supermarkets beat branded forecourts. Always.

Tesco, Asda, Sainsbury’s, Morrisons, and supermarket petrol stations are typically 3–5p per litre cheaper than Shell, BP, or Esso. That’s not a small difference. On a 50-litre fill-up, you’re already saving £1.50–£2.50 before you’ve done anything clever at all. There’s a persistent myth that supermarket fuel is somehow “lower quality.” It isn’t. It comes from the same refineries. The only difference is the price.

Potential saving: £45–£75 per year

Fill up mid-week, not on a Friday.

Fuel prices tend to creep up towards the weekend when demand spikes, everyone’s topping up for weekend trips and school runs. Filling up on a Tuesday or Wednesday, when prices are typically 1–2p per litre lower, isn’t life-changing on its own, but combined with everything else here, it all stacks up. One honest caveat: choosing a cheaper station will always save you far more than clever timing, so don’t obsess over the day if there’s a good-value station nearby, regardless.

Potential saving: £15–£30 per year

The Lesser-Known Ones (These Are The Good Bits)

Stack your loyalty cards; you’re allowed to have all of them.

Here’s something the petrol station definitely doesn’t advertise: there’s no rule saying you can only be in one loyalty scheme. Sign up for all of them and use whichever one matches where you’re filling up that day. Tesco Clubcard, Nectar (works at Sainsbury’s and Esso), Shell Go+, BPme, Asda Rewards, they’re all free, they all earn you something back. Nectar points can even be redeemed for 5p off per litre of fuel directly at the pump. A driver spending £150/month on fuel who properly uses these schemes can realistically save £50–£150 a year without changing a single other thing.

Potential saving: £50–£150 per year

The supermarket gift card trick (this one’s genuinely clever).

This is the one that made me do a double-take. Buy a digital gift card for a supermarket petrol station, Tesco, Sainsbury’s, Asda, Morrisons, through a cashback app like Jam Doughnut, Shopmium, or NX Rewards. You get instant cashback (typically 3–5%) just for buying the gift card. Then you use that gift card to pay for your petrol as normal. You still scan your Clubcard or Nectar card at the same time, so you’re still earning loyalty points on top. You are essentially getting paid twice for the same purchase. Takes about 90 seconds to set up the first time.

Potential savings: 3–5% on every fill-up

Don’t fill up when the delivery tanker is there.

This one comes straight from people who actually work in the fuel industry. When a tanker is replenishing the underground storage tanks at a petrol station, it stirs up sediment that’s been sitting at the bottom. If you fill up right after that delivery, some of that sediment can end up in your tank, and it’s not great for your engine over time, nor does it burn as efficiently. If you pull up and see a delivery lorry on the forecourt, it is genuinely worth going to the next station along or coming back later.

Protects your engine, protects your efficiency

Keep your fuel cap tight; it actually matters.

A loose or damaged fuel cap allows petrol to evaporate out of your tank as vapour. This may sound minor, but a poorly sealed cap can reduce fuel efficiency by up to 15%. Think about that. On a car that costs you £100 to fill, that’s £15 quietly disappearing into the air. Give your fuel cap a proper, firm twist every single time you fill up. If it’s cracked or the seal looks worn, a replacement cap costs a few pounds from any motor factors shop and pays for itself almost immediately.

Potential savings: up to 15% fuel efficiency

Fill up at half a tank, not when it’s empty.

Most of us wait until the warning light comes on before thinking about petrol. But here’s the thing. A tank that’s nearly empty has more air space inside it, and petrol evaporates faster when there’s more air in contact with it. Filling up at around the halfway mark keeps the tank fuller for longer, reduces evaporation, and, crucially, means you’re never in that desperate “I’ll take whatever station is nearest” situation that always seems to cost an extra 10p per litre.

Reduces evaporation and gives you price flexibility

Stop squeezing the trigger hard. Pump on a slower setting.

When you pump at the fastest setting , nozzle held fully open , some of the fuel can vaporise before it reaches your tank. Those vapours are drawn back into the station’s underground storage through the vapour return system, meaning you paid for fuel you didn’t actually get. Pumping more slowly, at about the middle setting on the trigger, reduces this effect. It takes a minute or two longer, but you’re getting more actual liquid fuel for your money. A small thing, but worth knowing.

Gets you more fuel per litre paid

Costco petrol, if you’re anywhere near one.

Costco members in the UK have access to Costco fuel stations, which typically sell petrol and diesel 5–10p per litre cheaper than the UK average. A Costco Gold Star membership is £42 per year. If you drive a reasonable amount, the fuel savings alone pay for the membership within a couple of months, and then you’ve got the warehouse shopping on top. Worth doing the maths for your situation, but for many families, this is genuinely one of the biggest petrol savings available.

Potential saving: £50–£200 per year depending on mileage

Stop idling. Your engine is drinking for free.

This one feels small but adds up horribly over a year. Modern cars do not need warming up before you drive, that was true of old carburettor engines, not anything built in the last two decades. If you’re sitting outside school waiting for the bell, parked up at the shops, or stuck in a long queue, your engine is burning roughly 1 litre of fuel per hour while going absolutely nowhere. At 135p a litre, that’s money disappearing for no reason at all. The rule of thumb: if you’re going to be stationary for more than about 60 seconds, switch off. Most modern cars have stop-start built in for exactly this reason. If yours does, don’t override it out of habit; let it do its job.

Potential saving: £20–£40 per year, depending on your routine

Check your tyre pressure regularly. This is the big one.

Of all the things on this list that happen quietly in the background without you noticing, under-inflated tyres might be the most expensive. Studies suggest that around half of all tyres on UK roads are under-inflated, and soft tyres create more rolling resistance, which means your engine has to work harder and burn more fuel just to maintain normal speed. The rough rule is that for every 0.2 bar your tyres are below the correct pressure, you’re burning about 1% more fuel. That might not sound like much, but a car with all four tyres even slightly soft could cost you 3–5% more on every journey, without a single visible sign that anything is wrong. Check your pressures once a month; the correct figures are on a sticker inside your driver’s door frame or in your owner’s manual, and most petrol stations have an air machine (usually free or 50p). Two minutes. Done.

Potential saving: £30–£60 per year

How to combine everything for maximum savings

The real magic happens when you layer these up. Here’s what a savvy fill-up looks like when you’re doing it properly:

1. Check your tyre pressures once a month so you’re not bleeding fuel silently.2. Check Fuel Finder UK for the cheapest local supermarket station.3. Buy a digital gift card for that supermarket through a cashback app (instant 3–5% back).4. Make sure your tank isn’t nearly empty, so you have the choice of station.5. Don’t fill up if a tanker is on the forecourt.6. At the pump: scan your loyalty card, pay with the gift card, pump on a mid-speed setting, and give that cap a firm twist at the end.7. Switch off if you’re waiting more than a minute anywhere near the forecourt.

Do all of this consistently, and you could realistically save £200–£300 a year. That’s a couple of tanks of petrol, essentially free.

I know some of this sounds like faff. But most of it is a two-second change to what you’re already doing. Downloading Fuel Finder takes 5 minutes the first time. Setting up one cashback app takes ten minutes once. After that, it’s just habit.

The petrol station has always felt like somewhere you simply hand money over and try not to think about it. But it doesn’t have to be. A bit of boring prep work and a few small habits, and you’re genuinely keeping real pounds in your purse every single week.

Go forth and fill up wisely. And maybe still buy the chocolate, you’ve earned it, and frankly, you’re now saving enough that you can afford it.

As always, sharing the stuff I wish someone had told me sooner.

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